Ratchet-drill and screw-threading device.



No. 633,880. Patented sept. '26,v |899.

J. MILLER.

RATCHET DRILL A'ND SCREW THBEADING DEVICE.

{Applic'ation led. June 18, 1898.)

El F

555125:' Mtth/m/q/ /b I vUNITED STATES v EEICE.

.Ioniv MILLER, orv CAMBRIDGE, MASSACHUSETTS, ASSICNCR or CNE-Tierno ToJOHN ARTHUR MILLER, oELoWEL-L, MASSACHUSETTS.

'RAToHET-DRILL AND so R|=.w-THREADINGv osvlcs.-

SPECIFICATION forming part of Lettersl'Pat'ent No. 633,880, datedSeptember 26, 1899. Application ined :rime 13.1898. serialuacsazes. (Nomais.)

provements in Ratchet-Drills and Screw Threading Devices, of which thefollowingis aspeciflcaton.V Y

This invention relates "to improvements in.

ratchet-drills and screw threading devices; and it has for 'its objectto provide an improvedimplement for the th reading of pipes orcylindrical metal bars with a right or left hand also applicable as aratchet-drill for drilling purposes, as will hereinafter be more full;Tshown and described, reference being had to the accompanying drawings,wherein- Figure l represents atop plan View of the In a perforation inthe-frame A is journaled the tubular guide C for thepipe or cylinderthat is to be threaded. The upper end of the tubular guide O is made asadie-holder C', in Which the screw-threading die D is contained.

C" is a cover hinged at C8 to the die-holder C' and adapted to be closedon top of the said die-holder and secured in such position when thedevice is in use as a screw-threading device, as shown in Fig.- 2.

Secured -to or made in one piece with the vsleeve C is a ratchet-wheelC4, which is inscrew, as maybe desired, and which shall he` I5invention, showin g the cover ofthe die-holder- Fig. et repre- Arepresents the hollow frame, provided with a handle B, as shown.Y

-frame A is pivoted at e thelpawl E, having lpawl projections E E", asshown in Fig. 3, adapted for engagement with the ratchet- Wheel C4, asshown in Figs. 2 and 3. Back of the pawl E is pivoted at f to the `frameA a block F, through a perforation in which is guided aspring-pressedpin G, the outer end or headfof which is held against the rear of thepawl E by the influence of a coiled spring g, as shown in Figs. 2 and 3.To the outer portion of the pivot of the block Fis secured a knob orhandle F', by means of 'which the block F and pin G may be turned from aposition shown in Fig. 3 to a position for caus ingan engagement of thepawl projection E with the ratchet-wheel 04, if desired, to rotate thelatter and its die-holder and die in a direction opposite to that shownby arrow in Fig. 3. f

It will thus be seen that by the adjustment of the position of the blockF and its spindle G the duplex pawl-lever E may be adjusted relative tothe ratchet-wheel C4 for turning the latter and its die-holder and dieto the right or left, as may be desired, for cutting right or lefthanded threads. In cutting threads on pipes or bars of less diametersthan the interior bore of the sleeve C a suitable guide-thimble isinserted in the latter, as is common in devices of this kind.

' If it is desired to use the invention as a ratchet-drilhl remove thescrew-threading die D from within the die-holder C' and use inconnection with the device a drill-holder. (Shown in perspective view inFig.4 and shown `in Fig. 5 as connected to the frame of the invention.)Said drill-holder consists of a cylindrical sleeve H, having a socket 7iin its lower end for the reception of the shank of the drill `I.(Shownin Fig. 5.) Within the upper end of the sleeve H- is secured a nuth', adapted to receive the screw-threaded feed-screwr K, as shown, saidfeed-screw having at its upper portion a head it', terminating as aconical end k', which is adapted lto be held against a 95 suitable restor Ysupport during the drilling operation, as is common in devices ofthis kind. The feed-screwK may be turned around its axis either by meansof a suit-able Wrench 5o closed Within the frame A. Within'l said orSpanner placed on the head 7e or by means roo of a rod inserted in ahole7c" in said head, as shown in Figs. 4 and 5. To the sleeve I-I issecured or made integral with it a plate H',

adapted to lit the interior of the die-holder O when the device is usedas a ratchet-drill, as represented in Fig. 5.

It will be noticed that the ratchet-Wheel C4, pawl E, spring-pressed pinG, and block F are all arranged inside of the frame of the device, bywhich said parts are wholly inclosed, so as to be kept clean andprotected from dust, grit, or other accumulations by which the efficacyof Working of said parts is materially augmented.

From the above description it will be seen that the invention may beused as a screwthreading device for cutting right or left handed screws,and it may also be used as a ratchet-drill by combining with it thedrillholding sleeve H in a manner and for the purpose hereinabove shownand described.

What I Wish to secure by Letters Patent and claim isf l. In aratchet-drill andscreW-threading device, the combination of the hollowframe A having a circular perforation `in one end, the tubular guide cextended through and journaled in said perforation andliaving anenlarged die-holding' chamber c in one end, the ratchet-Wheel c* securedto said tubular guide and inclosed in the said hollow frame, thereversible paWl E and the perforated block F each pivotally mountedwithin and wholly inclosed by said hollow frame, the pivotof said blockbeing extended beyond the frame and provided with a handle for adjustingsaid block, and the spring-pressed pin G mounted in said block andengaged with said pawl, substantially as and for the purpose described.

2. In a ratchet-drill and screw-threading,r device, the combination ofthe hollow frame A, the tubular guide c journaled in and extendedthrough said frame and provided in one end With the enlarged chamber c',a detachable drill-holder H mounted in said tubular guide c and providedwith a plate or projection H to interlock in the chamber c', a drill Icarried in one end ofsaid holder and a feed-screw 7c in the other theratchet-Wheel c4 on the guide-sleeve, o, the reversible pawl E, theperforated block F pivoted in the hol low frame and having its pivotextended outward and provided with a handle, and the spring-pressed pinG mounted in `said block and engaged with said pawl, substantially asand for the purpose described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

JOHN MILLER.

\Vitnesses:

ALBAN ANDRN, Moens W. S. JACKSON.

